//
// DotNetNuke - http://www.dotnetnuke.com
// Copyright (c) 2002-2010
// by Perpetual Motion Interactive Systems Inc. ( http://www.perpetualmotion.ca )
//
// Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated 
// documentation files (the "Software"), to deal in the Software without restriction, including without limitation 
// the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and 
// to permit persons to whom the Software is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all copies or substantial portions 
// of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED 
// TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 
// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF 
// CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
// DEALINGS IN THE SOFTWARE.
//

using System;
using System.Web;
using DotNetNuke.Common.Utilities;
using DotNetNuke.Entities.Portals;
namespace DotNetNuke.Entities.Users
{
	public class UserTime
	{
		public UserTime()
		{
		}
		public DateTime ConvertToUserTime(DateTime dt, double ClientTimeZone)
		{
			PortalSettings _portalSettings = PortalController.GetCurrentPortalSettings();
			return dt.AddMinutes(FromClientToServerFactor(ClientTimeZone, _portalSettings.TimeZoneOffset));
		}
		public DateTime ConvertToServerTime(DateTime dt, double ClientTimeZone)
		{
			PortalSettings _portalSettings = PortalController.GetCurrentPortalSettings();
			return dt.AddMinutes(FromServerToClientFactor(ClientTimeZone, _portalSettings.TimeZoneOffset));
		}
		public static DateTime CurrentTimeForUser(UserInfo User)
		{
			if (User == null || User.UserID == -1 || User.Profile.TimeZone == Null.NullInteger) {
				int intOffset = 0;
				PortalSettings objSettings = PortalController.GetCurrentPortalSettings();
				if (objSettings != null) {
					intOffset = objSettings.TimeZoneOffset;
				} else {
					PortalInfo objPCtr = new PortalController().GetPortal(User.PortalID);
					intOffset = objPCtr.TimeZoneOffset;
				}
				return DateTime.UtcNow.AddMinutes(intOffset);
			} else {
				return DateTime.UtcNow.AddMinutes(User.Profile.TimeZone);
			}
		}
		public DateTime CurrentUserTime {
			get {
				HttpContext context = HttpContext.Current;
				PortalSettings objSettings = PortalController.GetCurrentPortalSettings();
				if (!context.Request.IsAuthenticated) {
					return DateTime.UtcNow.AddMinutes(objSettings.TimeZoneOffset);
				} else {
					return DateTime.UtcNow.AddMinutes(objSettings.TimeZoneOffset).AddMinutes(ClientToServerTimeZoneFactor);
				}
			}
		}
		public double ClientToServerTimeZoneFactor {
			get {
				PortalSettings _portalSettings = PortalController.GetCurrentPortalSettings();
				UserInfo objUserInfo = UserController.GetCurrentUserInfo();
				return FromClientToServerFactor(objUserInfo.Profile.TimeZone, _portalSettings.TimeZoneOffset);
			}
		}
		public double ServerToClientTimeZoneFactor {
			get {
				UserInfo objUserInfo = UserController.GetCurrentUserInfo();
				PortalSettings _portalSettings = PortalController.GetCurrentPortalSettings();
				return FromServerToClientFactor(objUserInfo.Profile.TimeZone, _portalSettings.TimeZoneOffset);
			}
		}
		private double FromClientToServerFactor(double Client, double Server)
		{
			return Client - Server;
		}
		private double FromServerToClientFactor(double Client, double Server)
		{
			return Server - Client;
		}
	}
}
